FUNCTIONAL PERIODICITY. An experimental study of the mental and motor abilities of women during menstruation by Leta Stetter Hollingworth. Cloth, $1.15. Paper, 85c. ART MICHAEL ANGELO. By Romain Rolland. Twenty-two full-page illustrations. A critical and illuminating exposition of the genius of Michael Angelo. $2.65, postpaid. INTERIOR DECORATION: ITS PRINCIPLES AND PRACTICE. By Frank Alvah Parsons. Illustrated. $3.25, postpaid. THE BARBIZON PAINTERS. By Arthur Hoeber. One hundred illustrations in sepia, reproducing characteristic work of the school. $1.90, postpaid. THE BOOK OF MUSICAL KNOWLEDGE. By Arthur Elson. Illustrated. Gives in outline a general musical education, the evolution and history of music, the lives and works of the great composers, the various musical forms and their analysis, the instruments and their use, and several special topics. $3.75, postpaid. MODERN PAINTING: ITS TENDENCY AND MEANING. By Willard Huntington Wright, author of “What Nietzsche Taught,” etc. Four color plates and 24 illustrations. “Modern Painting” gives—for the first time in any language—a clear, compact review of all the important activities of modern art which began with Delacroix and ended only with the war. Send $2.75. THE ROMANCE OF LEONARDO DA VINCI. By A. J. Anderson. Photogravure frontispiece and 16 illustrations in half-tone. Sets forth the great artist as a man so profoundly interested in and closely allied with every movement of his age that he might be called an incarnation of the Renaissance. $3.95, postpaid. THE COLOUR OF PARIS. By Lucien Descaves. Large 8vo. New edition, with 60 illustrations printed in four colors from paintings by the Japanese artist, Yoshio Markino. By the members of the Academy Goncourt under the general editorship of M. Lucien Descaves. Send $3.30. SCIENCE AND SOCIOLOGY CAUSES AND CURES OF CRIME. A popular study of criminology from the bio-social viewpoint. By Thomas Speed Mosby, former Pardon Attorney, State of Missouri, member American Institute of Criminal Law and Criminology, etc. 356 pages, with 100 original illustrations. Price, $2.15, postpaid. THE PSYCHOLOGY OF RELAXATION. By G. T. W. Patrick. A notable and unusually interesting volume explaining the importance of sports, laughter, profanity, the use of alcohol and even war as furnishing needed relaxation to the higher nerve centres. Send 88c.